Codename: Kids Next Door

Ben Diskin

Numbuh 1 / Numbuh 2 (voice)

Lauren Tom

Numbuh 3 (voice)

Dee Bradley Baker

Numbuh 4 (voice)

Cree Summer

Numbuh 5 (voice)

Tom Kenny

Chester (voice) / Chester / President / Robber #1 (voice) / Counselor / Campers (voice) / Fake Delightful Child from Down the Lane (voice) / Goof (voice) / Hoagie Gilligan IV (voice) / Kenny (voice) / Knightbrace (voice) / Mr. Jelly / Knightbrace (voice) / Mr. Wink (voice) / Narrator (voice) / Numbuh 16 / Numbuh 67 / Numbuh 68 (voice) / Numbuh 30C (voice) / Numbuh 42 / Numbuh Ezekiel (voice) / Teen / Jock / Guard (voice) / The Common Cold / Flu Bug (voice) / Twin Boy / Vicious Dog (voice)

Jennifer Hale

(voice) / Computer (voice) / Computer / Nerd (voice) / Computer / Rupert's Mom / Reporter (voice) / Dixie / Runt (voice) / Girls (voice) / Mrs. Beetles (voice) / Mrs. Thompson (voice) / Mrs. Thompson / Robber #3 (voice) / Mrs. Uno (voice) / Mrs. Uno / Major Mrs. Manners (voice) / Numbuh 202 (voice) / Numbuh 86 / Nurse Claiborne / Rainbow Monkey Chorus (voice) / Secretary / Assistant (voice) / Stacey (voice)

Daran Norris

(voice) / Announcer / Assistant / Homeworko (voice) / Count Spankulot / Gooey / Ice Cream Man #2 (voice) / Count Spankulot / Joe Balooka / Spankenstine Monster (voice) / Ed / Guard #1 / Lead Mustache (voice) / Gooey (voice) / Guards / DJ (voice) / Joe Balooka (voice) / Maitre'd / Violinist (voice) / Monty Uno / Count Spankulot / Sargent Sensible (voice) / Mr. Physically Fitastic / The Human Text (voice) / RAMON-4 (voice)

Jeff Bennett

Destructo Dad (voice) / Destructo Dad / Mr. Boss / Mr. Fizz (voice) / Dr. Teef (voice) / Hoagie Gilligan Sr. (voice) / Mr. Boss (voice) / Numbuh Jebediah (voice) / Sydney Beetles (voice) / Sydney Beetles / Mr. Boss / Technicians (voice)

Candi Milo

Betty Gilligan (voice) / Betty Gilligan / Grandma Lydia (voice) / Edna Jucation (voice) / Grandma Lydia (voice) / Henrietta Von Marzipan (voice) / Lasso Lass (voice) / Leaky Leona / Mrs. Goodwall (voice) / Leona (voice) / Madame Margaret (voice) / Nurse Jumbo (voice) / Salmonella Fitzgerald (voice)

Jason Harris

(voice) / Chad Dickson (voice) / Commander (voice) / Marty / Jock (voice) / Numbuh 274 (voice)

Frank Welker

Bus Driver (voice) / Professor XXXL / Chimpy (voice) / Professor XXXL / Defense Array (voice) / Rainbow Monkey Kong (voice) / Truck Driver (voice)

Grey DeLisle

Crazy Old Cat Lady / Mega Mom (voice) / Grace / Lizzie Devine (voice) / Gramma Stuffum (voice) / Julie / Cheerleader (voice) / Laura Limpin / Additional Voices (voice) / Lizzie / Woman (voice) / Lizzie Devine / Laura Limpin (voice) / Mega Mom / Numbuh 69 (voice)

Tara Strong

Girl (voice) / Girls (voice) / Mushi Sanban (voice) / Mushi Sanban / Numbuh 93 (voice) / Mushi Sanban / Stewie (voice) / Pauley Marcus (voice) / Rainbow Monkey Tribesgirl #3 (voice) / Sally Sanban (voice)

Rachael MacFarlane

(voice) / Girls (voice) / Numbuh 362 (voice)

Mark Hamill

Stickybeard (voice) / Stickybeard / Sumo Wrestler / Pirate (voice)

Rob Paulsen

(voice) / Mr. Mogul / Monkey (voice) / Mr. Washer / Chili Dog Vendor (voice) / Robin Food (voice) / Rupert Puttkin / The Great Puttinski (voice)

Maurice LaMarche

Father (voice)

James Arnold Taylor

Eggbert Eggleston (voice) / King Sandy / Knight #2 / Guard #1 (voice)

Dave Wittenberg

Ernest "Ernie" / Nick (voice) / Nick (voice) / Numbuh 74.239 (voice) / Wintergreen (voice)

Kevin Michael Richardson

Dr. Lincoln (voice) / Ice Cream Man / Ice Cream Beast (voice)

Carlos Alazraqui

Numbuh 2x4 (voice) / The Kid / Pedestrian (voice)

Keone Young

Kani Sanban (voice)

Josh Peck

Numbuh 50 Million B.C. (voice)

Matt Levin

Hooves (voice)

Roger Rose

Little Juan (voice)

Jess Harnell

Tony Clownarelli (voice)

Roger L. Jackson

Bonko (voice)

Jason Marsden

Numbuh 80 (voice)

Hynden Walch

Numbuh Rebecca (voice)

Eddie Deezen

Ice Cream Guy (voice)

Gregg Berger

Hotline (voice)

Tom Warburton

Chef (voice)

John DiMaggio

Big Brother (voice)

Tom Kane

Simon / Monkey (voice)